Telecommunications – Receiver or analog modulated signal frequency converter – With wave collector
Patent
1998-01-02
2000-05-09
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
With wave collector
4552781, 4552772, H04B 106
Patent
active
060615532
ABSTRACT:
An adaptive antenna is disclosed, that comprises a plurality of antenna elements 1.sub.1, 1.sub.2, . . . , and 1.sub.N with different directivity, delay profile measuring units 2.sub.1, 2.sub.2, . . . , and 2.sub.N for estimating states of received signals of the antenna elements for each of delay times that have been designated, antenna selecting units 3.sub.1, 3.sub.2, . . . , and 3.sub.L for selecting a part of the antenna elements for each of the delay times corresponding to the estimated result, adaptive signal processing portions 4.sub.1, 4.sub.2, . . . , and 4.sub.L for determining the received signals of the part of the antenna elements that have been selected and multiplying the received signals to which relevant weights have been determined for each of the delay time and summing the weighted signals, delaying circuits 5.sub.2 and 5.sub.3 for compensating the time lag, or delay of each of the received signals for each of the delay times, and a combining unit 6 for combining the weighted signals that have been compensated for the delay times.
REFERENCES:
patent: 4736460 (1988-04-01), Rilling
H. Wang, et al., Electronics and Communications in Japan, Part 1-Communications, vol. 76, No. 5, pp. 101-113, "Adaptive Array Antenna Combined with Tapped Delay Line Using Processing Gain for Direct-Sequence/Spread-Spectrum Multiple-Access System", May 1, 1993.
Yasutaka Ogawa, et al., "Spatial-Domain Path-Diversity Using an Adaptive Array for Mobile Communications", Proceeding of 4.sup.th IEEE Inernational Conference on Universal Personal Communications, Nov. 1995, pp. 600-604.
Matsuoka Hidehiro
Murakami Yasushi
Shoki Hiroki
Tsujimura Akihiro
Banks-Harold Marsha D.
Eisenzopf Reinhard J.
Kabushiki Kaisha Toshiba
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